17. The principal energy source of upper stage break ups clearly appears to be residual propellants, whether in the form of hypergolics, cryogenics, monopropellants or simple oxidizers.

Residual propellant elimination is normally accomplished by initiating depletion burns or simply venting propellant tanks.

A propellant uncertainty margin is used to hold back on board propellant reserves and guarantee that satellites are not stranded in orbit.

Additional propellant or electrical power resources may be needed.

Switzerland reports restrictions on the use of HFCs and PFCs as aerosol propellants and extinguishing agents in fire protection equipment.

16. Propellant elimination actions should also be designed to relieve high pressure gases employed in pressure fed propulsion systems.

The second is more than 90 percent of the weight of a vehicle is in propellant.

They are unguided and use solid propellant motors.

However, it requires planning and reserving the necessary propellant resources to effect the manoeuvre.

When the tank structure failed, the propellants ignited and the stage exploded.

Detailed satellite propellant budgets are maintained, including a record of all manoeuvres.

Rockets often spiral out of control if you put too much propellant in them.

(i) The use of solid propulsion in orbit is prohibited (they create clouds of aluminium particles)

(b) Reactor NPS as sources of electricity (NPUs and NPPUs for energy systems) and power (NPUs plus electrojet propulsion systems, NPPUs for power systems and rocket propulsion technology) with ejection of the propellant (plasmas of inert gas, hydrogen or hydrogen bearing coolants) into space.

(a) In the case of a single launch, the orbiter must be rendered passive, which means that residual propellants, including the performance reserve and the propellants used in the attitude control system, must have been emptied and the tanks depressurized

I like this equipment, you know, and I really value it so we're not going to burn the gear.

Mathematical models are employed to calculate propellant usage and predict remaining reserves.

This can normally be accomplished by keeping propellant lines and vents open for longer periods.

The performance cost to reboost is 3.64 m s for each 100 km or 1.69 kg of propellant for each 1,000 kg of spacecraft mass.

Satellites are equipped, when possible, with measurement devices to assist in determining end of propellant conditions.

If a manoeuvre is executed, it is nominally 0.3 metres per second at an expenditure of 12 to 20 kilograms of propellant.

For vehicles where fuel and oxidizer is to reside in a common propellant tank, separated only by a membrane or wall, venting procedures should be designed to prevent the development of excessive differential pressures.

All equipment and raw materials were removed from the Mamoun site, where all solid propellant was produced.

Because of conservative propellant budgeting INTELSAT normally exceeds the targeted decommissioning altitude.

Because of conservative propellant budgeting, INTELSAT normally exceeds the targeted decommissioning altitude.

If raising the orbit is to be the technique of choice, then it requires planning and reserving the necessary propellant resources to effect the manoeuvre.

The United States Centaur hydrazine altitude control system also burns residual propellants to depletion after payload separation.

For some missions, the performance of the launch vehicle leaves a sufficient margin of propellant available for the stage to do a de orbit burn.

For some missions, the performance of the launch vehicle has a sufficient margin so that the stage has propellant available to do a de orbit burn.

C. Space debris reduction practices NASDA has implemented the draining of residual propellants (LOX, LH2, N2H4) and residual helium gas of the H I H II second stage.

The operating time of the engine unit is selected according to the criterion of ensuring complete burn up of the propellant components.

The performance cost for reorbiting is 3.64 metres per second for each 100 kilometres, or 1.69 kilograms of propellant for each 1,000 kilograms of spacecraft mass.

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The addition of relief valves to deplete residual propellants might decrease system reliability, but these effects are often quite small.

The process needs a catalyst and a facilitator.

This system is designed to release, after separation of the satellite, the residual propellant from the tank and the residual gas from the high pressure container in the booster, in order to avert the danger of in orbit disintegration of the upper stage.

In fact, you can get it better you can get it at 14 times lower if you can find propellant on the moon.

Analysis indicated that with residual propellants, the nitrogen tetroxide and helium could be heated to temperatures that would generate pressure exceeding the strength of the material.

The Europeans have expressed interest in examining the possibilities for providing a crew rescue vehicle and also an automated transfer vehicle, which would provide propellant resupply and reboost.

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Active elements such as batteries or tanks containing residual propellant must reach a fully inert state after delivering the satellites to orbit

(d) Propellant, pressurized fluids and stored electrical and mechanical energy that remain in orbital systems and elements at the end of mission should be safely dissipated.

The Japanese space agency NASDA has implemented the draining of residual propellants (LOX, LH2, N2H4) and residual helium gas of the second stage of the H I H II launcher.

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Since then, a number of different techniques have been used to burn or vent the stored propellants and pressurants and to open electrical circuits and batteries.